Lighting-fixture



C. R. LEIMECKE, DECD.

B. c. LEIMECKE', \vmo'w.

LIGHTING nxruae. APPLICATION FILED MAYZZ. 1920.

Patented Dec. 6, 1921..

3 SHEETS-SHEET Z.

fizz/6 222212" 'izarea, flea C. R. LEIMECKE, DECD. a; c. LEIMECKE, wmow.

LIGHTING FIXTURE.

APPLICATION man MAY 21. 1920.

Patented Dec. 6, 1921.

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CHARLES LEIMECKE, DETROIT, IVIICHIGAN; BLANCH-IE C. VIIDOW 0F SAID CHARLES R. LEIMEGKE, DECEASED.

LIGHTING-FIXTURE.

Application filed May 27, 1920. Serial No. 384,600;

To all whom it may concern Be itlrnown that LCirAnLns it. LEIMEOKE, a citizen of the United States, residing at Detroit, hlichigan, have invented a certain new and useful improvement in Lighting- Fixtures, of which the following a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawin s, forming part of this specification.

My invention relates generally to devices for the distribution of artificial light, and more particularly to that type of device known as a semi-direct lighting fixture, and which latter, it will be understood, is designed for the purpose of utilizing to the best advantage, the reflected rays of practically all the light produced by the electric lamp or other source of light associated with the fixture, and to effect a uniform distribution of such reflected light rays.

The principal objects of my invention are, to provide a relatively simpleiighting fixture, the construction of which is such that it may be easily and cheaply manufactured and readily assembled or taken apart; and, further, to provide a fixturewherein the entire lower portion including the reflectors, the source of light, and bowl are not only adjustable with respect to each other but are capable of being bodily raised or lowered in order to obtain the desired or correct illumination and also to obtain proper diffusion of all of the direct and reflected rays from the source of light associated with the fixture.

Further objects of my invention are, to provide a lighting fixture with a semi-f0- cusing reflector that is disposed between the source of light and the main reflector, which semi-focusing reflector is composed in part of clear or transparent glass and partly of translucent glass, the latter being disposed so as to prevent direct rays from the source of lightfrom reaching the main reflecting surface of the fixture, and, further, to arrange the reflectors and bowl so that electric lamps of different sizes may be interchangeably used in the fixture and the bowl being mounted so that it may be swung to one side and upwardly without interfering with other parts of the fixture in order to permit the ready installation or removal of a lamp Specification of Letters Patent.

Patented Demo, 1921.

' or for the purpose ofcleanin'g said bowl, the

parts of the fixture, or the lamp that is positioned therein.

With the foregoing and other objects in wow, my invention consists in certain novel features of construction and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompany ing drawings, in which+- Figure 1 is a vertical section taken through the center of a lighting fixture of my improved construction.

Fig. 2 is a plan view of a bridge plate that serves as a support and connecting member for the various parts of my improved fixture.

Fig. 3 is a plan View of the plate that is secured tothe ceiling immediately overthe outlet box therein. and which plate forms a support for the fixture.

Fig. 4 is an elevational view of the fixture with the adjustable parts "in elevated position and with dotted lines showing a bowl tilted to permit the insert-ion or removal of a lamp or for the purpose of cleaning said lamp or the lower portion of the fixture.

Fig. 5 is an enlarged vertical section taken approximately on the line 55 of 4:;

Fig. 6 is a detail section illustrating a bufferspring against which the edge of the bowl engages when the same is shifted to permit the insertion or removal of a lamp or for the purpose of cleaning said lamp or fixture.

Fig. 7 is an elevational view of a modified form of my improved lighting fixture where in theniain body portion of the fixture is suspended a substantial distance below the ceiling.

Fig. 8 is an ele-vational'view partly in section of a form of fixture that is suspended directly beneath the ceiling.

Referring by numerals to the accompanying drawings, and particularly to the construction illustrated inFigs. l to 6 inclusive, 1O designates a. plate preferably of metal that is secured in any suitable man-' ner directly to the ceiling or to an outlet box located in the ceiling and secured in any suitable manner to said plate and inclosing the same is a ring 11, preferably formed of sheet metal and opening 1 Secured to plate 10 is'a depending cylinprovided in'its lower end with an drical member 13 that extends through opening 12 and secured to and depending from the center of plate 10 and centrally located within said member 13 is a rod 14. 'Arranged for sliding movement on this rod is a substantially rectangular frame 15, and positioned on the rod above this frame is a buffer spring 16that is adapted to break the force of the upwardmovement of frame when the lower portion of the fixture is drawn downward to its limit of movement.

Secured to frame 15 is a collar 17 through which rod 14 passes, and seated in said col lar is a set screw 18 by means of which the collar and frame may be locked to the rod after vertical adjustment thereupon.

Arranged for vertical sliding movement upon cylindrical member 13 is a sleeve 19, preferably of sheet metal, thelower portion of which is provided with an outwardly pro jecting depending ornamental flange 20, and the lower portion of the latter is provided 1 with a plurality of short vertically disposed slots 21 that are arranged preferably at ninety degrees apart.

Positioned in the space within flange 20 is a bridge plate comprising a ring-shaped body portion 22 from which projects a plurality of radially disposedarms 23, the latter being arranged preferably at ninetydegrees apart and the outer portions of these arms project through the slot 21 in flange 20. Projecting upwardly from the outer ends of arms 22 are threaded pins 23 and positioned thereupon are outwardly projecting hooks 24 that are retained in position by nuts 25.

ceiling plate 10 and the corresponding ends of said flexible members are secured in any suitable manner to cars 15 which project laterally from the frame 15.

Depending from ceiling ring 10 and arranged preferably at right angles to the pulleys 30 are guide rods 31 and arranged to slide thereupon are tubular members 32.

that are fixed to and project upwardly from the ring-shaped body portion 22 of the bridge. The construction just described is effective in guiding the bridge plate. and. parts carried thereby during its vertical movement and holding said parts firmly aga nst lateral swinging movement.

Suspended 1n any suitable manner from a downwardly curved outer portion 34.

J Depending from the members of an oppositely disposed pair of the arms 23 are rods 35, and arranged for adjustment on the upper portions thereof and to be locked thereto after adjustment by means of set screws 86 are collars 37 Supportedby these collars 87 is an inner secondary reflector constructed from 'metal, porcelain, or any desired material, and the body thereof comprises a substantially horizontal outer portion 38, the outer edge. thereof terminatingin a vertically disposed flange 39, and the inner portion being curved inwardly and downwardly as designated by 40. The hori zontally disposed portion 38 is provided with suitable perforations which receive the supporting rods and the upstanding flange 89 projects upwardly through the opening in the center of the main reflector.

The surface of the inwardly curved portion 40 of this inner or-secondary reflector combines with thennder surfaces of the portions 38 and 33, and the under surfaceof portion 84 of the main reflector to form a substantially parabolic reflecting surface that is effective in deflecting light rays outwardly and downwardly.

Secured in any suitable manner to the top of thesecondary reflector and imme-' diately over the opening in the center thereof is a socket 41 to which lead suitable electrical conductors and said socket being adapted to receive an electric lamp such as 42. Positioned on the lower portions of rods 35 are collars 43' that are adapted to be locked to said rods by set screws 44 and depending from said collars are hooks 45. Suspended by means of suitable" links 46 from these hooks is an open-topped bowl 47, preferably of glass, and the top of this bowl occupiesa horizontal plane a short distance below the plane occupied by the lower edge of the main reflector comprising the parts 33 and 84. r

Positioned within the open upper end of the bowl 47 and immediately below the center or secondary reflector comprisingthe parts 38 and 40 is a semi-focusing reflector,

preferably constructed of glass, and of substantially flat conical or bell-shape. The upper end of this semi-focusing reflector terminates in a tubular neck 48 that pro jects upwardly into the opening that is formed in the center of the secondary reflector, and the outer face of said neck being provided with a plurality of annular grooves 49 which are'adaptedto receive the inner ends of set screws 50 the latter passing through the lower portion of the inwardly curved wall 40.

By virtue of the construction just described, the semi-focusing reflector may be adjusted vertically with respect to the center or secondary reflector and likewisewith respect to the lamp that is seated in and de pends from the socket 41. That portion of the semi-focusing reflector immediately beneath the tubular neclr i8 is curved outwardly and downwardly as designated by 51 and this particular portion is formed of clear or transparent glass and the lower portion 52 of this semi-focusing reflector or that portion which depends fromthe portion 51 is formed of translucent glass, andas a result, the direct rays of light from the filament or lamp 42 are prevented from strikingthe reflecting surface of the portion 34: of the main reflector.

The lower portion of the fixture including the reflectors, the lamp, and the bowl can be adjusted vertically by raising or lower-' ing said lower portion to the desired horizontal plane, and after. proper adjustment, collar 17 is locked to rod 14 by tightening set screw 18, thereby eflectually holding the entire lower portion of the fixture in its adjusted position.

During the vertical movement of the lower portion of the fixture, the bridge com prising the parts and 23 is guided and firmly held by the engagement of rods 31 in tubes 32, and as a result, the lower portions of the fixture are held against lateral swinging movement.

The vertical positions of the inner or central reflector comprising parts 38 and 40, the semi-focusing reflector, and the lamp can be adjusted by raising or lowering the collars 37 upon rods and which collars support the secondary or central reflector. The semii ocusing reflector can be independently adjusted vertically by moving the collar 48 upwardly or downwardly through the opening in the central reflector and locking said semi-focusing reflector after adjustment by proper manipulation of the setscrews 50, the inner ends of which latter are adapted to engage in the grooves l-9.

Bowl 47 can be adjusted vertically with respect to the lamp l2 and the semi-focusing reflector by raising or lowering the collars 43 from which said bowl is supported and said collars being locked to rods 85 by set screws n.

Thus the entire lower portion of the fixture can be raised or lowered as a unit and in order to insure proper distribution of reflected light from the lamp and to.obtain a maximum degree of efiiciency or lighting effect from the fixture, the lamp and central reflector, the semi-focusing reflector, and the bowl are vertically adjustable with respect to each other.

tion with the fixture.

The position of the semi-focusing reflector and the arrangement of the clear and translucent portions thereofpermits direct rays from the lamp to pass directly upward and outward onto the reflecting surfaces of the portions 38 and lO of the center reflector, but prevents direct light rays from passing onto the reflecting surfaces of the portions 33 and 8d; of the outer or main reflector. As a result of this arrangement,practically all of the light rays passing in anupward direction from the source of light contact either directly or indirectly with the reflector comprising the reflecting surfaces of the parts 33, 3 38 and a0 and by. said surfaces, these light rays are reflected downwardly and outwardly from the fixture to combine with the light rays which pass downwardly and outwardly through the translucent bowl 47.

JV hen it is desired to replace the lamp or clean the lamp that is positioned in the fir.- ture or to clean the interior of the bowl 47 or the interior of the semiiocusing reflector, bowl. 4-7 is tilted into the position shown by dotted lines in Fig. 4-, during which tilting movement the links 4-6 swing upon the hooks l5 and in order to protect the inner or secondary reflector from injury as a result of contact with the upper edge or the bowl, a relatively small lightspring such as a, Fig. 6, is secured to the under side of portion 38 of said inner or secondary reflector to act as a buffer for the ed e of the bowl when the latter is swung upwardly.

In Fig. 7 I have shown my improved flxture as being suspended a substantial distance below the ceiling and where this is done, the means utilized for effecting verticaladjustment of the entire lower portion or the bowl is eliminated and the portion of a suitable ornamental hanger such as A, Fig. 7, is connected directly to the sleeve 19.

in Fig. 8 I have illustrated a modified construction wherein the fixture is adapted to be positioned immediately acent to the ceiling and said fixture being devoid of the arrangements for adjusting its entire lower portion as a unit.

A; lighting fixture of my improved con-. struction is comparatively simple, is capable of being readily assembled or taken apart, and by virtue ofits various adjustments, it is possible to obtain maximum efliciency of practically all the light rays emanating from the lampor source of light used in connec- I claim as my invention:

'1 In a lighting fixture, the combination of a vertically adjustable outer reflector having a reflecting surface, an extension forming a secondary or inner reflector also having a reflecting surface and which is arranged for vertical adjustment independently of said outer reflector, a bowl suspended beneath said inner reflector, a source of light within said bowl, and a semi'focusing reflector arranged between said source of light and said outer reflector.

2. In a lightlng fixture, a reflector, a bowl suspended beneath said reflector, there being i'ocusing reflector is provided with a clearor transparent upper portion and a translucent lower portion.

In a lighting fixture, a reflector-,2, bowl suspended beneath said reflector, therebeing an open space between the top of said bowl and the reflecting surface of said reflector, a source of light within said bowl, a semi.- i'ocusing reflector disposed between said source of light and the reflector, which semiiocusing reflector is provided with a clear or transparent upper portion and a translucent lower portion, and said semi-focusing reflector being vertically adjustable withrespect to said bowl.

l. In a lighting fixture, a reflector comprising inner and outer portions, the inner portion being vertically adjustable independently oi the outer portion, a semi-focusing reflector carried by said adjustable inner portion, a source of light immediately below said sen1ii'ocusing reflector, and a bowl suspended in position beneath said semi-focus ing reflector and said source of light.

5. In a lighting fixture, a reflector comprising inner and outer portions, the inner portion being vertically adjustable independently of the outer portion, a semi-focusing reflector carried by said adjustable inner portion, a source of light immediately below said semi-focusing reflector, a bowl suspend ed in position beneath said semi-focusing reflector and said source of light, and which bowl is vertically adjustable with respect to said reflector.

6. In a lighting fixture, a reflector comprising inner and outer parts, the inner part being mounted for vertical adjustment independently of the outer part, a socket carried by said inner part and adapted to receive a lamp, and a semi-focusing reflector carried by said inner part,

7. In a lighting fixture, a reflector come prising inner and outer parts, the inner part being mounted for vertical adjustment independently of the other part, a socket carried by said inner part and adapted to receive a her, an outer annular reflector carried thereby, a second inner reflector arranged within flector, a source of light immediately below said semi-focusing reflector, and a bowl suspendedgbelow saidsemi-focusing reflector andsource of light.

9. In a lighting fixture, a supporting member designed to be fixedly attached to the ceiling, a reflector comprisingan outer and an inner member, the latter being vertically adjustable with respect to said outer member and the supporting member, a source of light carried by and depending from said inner member, a vertically adjustable bowl suspended from the supporting member and partially inclosing said source of light, and a semi-focusing. reflector arranged between the source of light and the outer member of said reflector.

10. In a lighting with a reflector with a source of light disposed beneath thesame, of a semi-focusing reflector disposed between said reflector and source of light, and saidsemi-focusing reflector being mounted for'vertical adjustment with respect to said source of light and reflector. i

llfiIn'a lighting fixture, the combination with a reflector with a source of light disposed beneath the same, of a semi-focusing reflector disposed between said reflector and source. of light, and said semi-focusing reflector being provided with a clear or transparent upper portion and with a translucent lower portion.

12. In a vertically adjustable lighting fixfixture, the combination ture a reflector included therein, a bowl suspended beneath-said reflector, means for mounting said bowl and its connected parts whereby they may be rocked to elevate one edge and lower the opposite edge, a cushion spring on the reflector for absorbing shocks, when said bowl is rocked, and a source of light arranged below said reflector and with in said bowl.

13. In a lighting fixture, a vertically adjustable reflector, a'bowl suspended beneath saidreflector and mounted so as to be rocked to elevate one edge and lower the opposite edge, a source of light arranged below said reflector and within said bowl, and a semifocusing reflector arranged between said sourceoi light and the reflector.

In testimony whereof I hereunto afflx my signature this 22nd day of May, .1920.

, C. R. LEIMECKE. 

